First author is with Departmento de Quı´mica, Universidade Federal de Sa˜o Carlos; 2nd, 3rd and 4th authors are with Departamento de Engenharia Quı´mica, Centro Universita´rio da FEI; 5th author is with Departmentof Physics, Bhavan’s Sheth R. A. College of Science; 6th author is with Centre for Crystalline Materials, School of Science and Technology, Sunway University